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1949 Map of Tierra Redonda Mountain

Name: 1949 Topographic Map of Tierra Redonda Mountain
Creator: U.S. Geological Survey
Published: 1979
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1979

About this map

The San Antonio Reservoir and Nacimiento Reservoir dominate this central California landscape at the border of Monterey and San Luis Obispo Counties. This 1949 survey, updated with revisions from 1976, captures the dramatic terrain of the Santa Lucia Range foothills, centered on the prominent Tierra Redonda Mountain. The mapping reveals the infrastructure of water management in the region, including the San Antonio Dam and the Nacimiento Dam which transformed the San Antonio River and Nacimiento River valleys.

Small settlements and geographic pockets such as Bee Rock and Harris Valley provide evidence of local land use, while the expanse of the Hames Valley at the northern edge contrasts with the deep cuts of Sulphur Canyon and Bee Rock Canyon. This map serves as an important record for understanding how these massive hydraulic projects reshaped the local topography and the historic agricultural valleys that previously defined the area.